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https://issues.apache.org/jira/browse/HADOOP-15312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16399377#comment-16399377
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Wei-Chiu Chuang commented on HADOOP-15312:
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Interesting. So these two configs are fed into KeyProvider.generateKey(), and
used by KeyGenerator.getInstance() and keyGenerator.init() respectively.
For the algorithm, the default value "AES/CTR/NoPadding" is split by / and only
the first substring "AES" is used in KeyGenerator.getInstance().
[https://docs.oracle.com/javase/7/docs/api/javax/crypto/KeyGenerator.html#getInstance(java.lang.String)]
[https://docs.oracle.com/javase/7/docs/api/javax/crypto/KeyGenerator.html#init(int)]
> Undocumented KeyProvider configuration keys
> -------------------------------------------
>
> Key: HADOOP-15312
> URL: https://issues.apache.org/jira/browse/HADOOP-15312
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Wei-Chiu Chuang
> Assignee: LiXin Ge
> Priority: Major
> Attachments: HADOOP-15312.001.patch
>
>
> Via HADOOP-14445, I found two undocumented configuration keys:
> hadoop.security.key.default.bitlength and hadoop.security.key.default.cipher
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